Network Watchdog without an MFP?

This may be a dumb question, but to date - I've not actually set up / relied upon Reflex at all, but I want to get something setup "In case".

Skimming the Help pages ... It seems to state that you can only setup a System watchdog on an MFP - is this true? (I don't have any MFP's on my setup).

Without it, if my PC hangs / crashes or is otherwise unavailable, would Idranet not fall back to Reflex control?

Cheers

Cliff